Modeling, simulation and fabrication of coated structures using the dip coating technique

Jittavanich, K.; Clemons, C. B.; Kreider, K. L.; Aljarrah, Mohannad T.; Evans, Edward A.; Young, G. W.

doi:10.1016/j.ces.2010.09.001

Cited by 19 publications

(11 citation statements)

References 34 publications

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“…The dip-coating technique, as based on the capillary theory, forms a layer on the surface through three steps: immersion, formation, and evaporation. The loading amount and coating thickness are determined by the polymer slurry viscosity, the dipping and withdrawing rates, the number of coatings, the evaporation rate of solvents, and the drying conditions [19,20]. Therefore, thin layers for preserving the pore size and porosity of the conventional separator could be formed under the condi- tions of the low polymer slurry viscosity, the rapid evaporation rate of the solvent at an ambient temperature, and the slow withdrawal rate.…”

Section: Physical Propertiesmentioning

confidence: 99%

Flame retardant coated polyolefin separators for the safety of lithium ion batteries

Lee

Shin

Moon

2015

Korean J. Chem. Eng.

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A thermally stable and flame-retardant separator is proposed to improve the safety of lithium ion batteries. The separator is prepared by dip-coating both sides of a conventional tri-layer polyolefin separator with brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO). Significantly reduced thermal shrinkage and flammability are exhibited without decreases in the pore size or porosity of the conventional separator. By using the BPPO-coated separator, an electrochemical half-cell composed of a lithium metal anode and a LiCoO 2 cathode are successively tested. The resulting stable cycle performances are demonstrated. It is expected that the BPPO-coated separator can be a capable candidate as a separator for the safe of lithium ion batteries.

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Section: Physical Propertiesmentioning

confidence: 99%

Flame retardant coated polyolefin separators for the safety of lithium ion batteries

Lee

Shin

Moon

2015

Korean J. Chem. Eng.

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“…The rheology of dip-coatings specially needs to prevent precipitation during storage, sagging and leveling, etc (Patton, 1979). Specifically, in dip-coating technique (Strawbridge and James, 1986;Javidi and Hrymak, 2015), the quality of the final film thickness is related to the viscosity and the yield stress of the film-forming fluid (Jittavanich et al, 2010;Javidi and Hrymak, 2015). Shear stress, shear rate, viscosity and yield value are important parameters that reflect the fluid rheology behaviors (Grosso, 2011).…”

Section: Effect Of Shear Rates On Dip-coatings' Viscositiesmentioning

confidence: 99%

“…Cui et al (2009) found a facile dip-coating process to prepare paint films. Jittavanich et al (2010) investigated the dip-coating technique by the way of modeling, simulation and fabrication. Grosso (2011) reviewed the dip-coating mechanism and thickness controlling.…”

Section: Introductionmentioning

confidence: 99%

Effects of viscous flow activation energies and viscosities on waterborne light-diffusion dip-coatings

Fang

2019

PRT

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Purpose This paper aims to prepare good waterborne light-diffusion dip-coatings (WLDDC) for the glass lampshade inner walls of LED lamp tubes, the effects of viscosities and viscous flow activation energies on these dip-coatings were investigated. Design/methodology/approach The WLDDC were prepared using white pigments, light-diffusion agents, additives and an acrylic emulsion. The dip-coatings were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and a digital rotational viscometer, respectively. The effects of shear rates, temperatures and solids contents on the viscosities of the dip-coatings were studied. The viscous flow activation energies of these dip-coatings and the emulsion were calculated, compared and studied, respectively. Findings The results showed that the non-Newtonian behaviors of these dip-coatings were more prominent than that of the acrylic emulsion. When the temperature was maintained to be a constant and the shear rate was increased, the viscosity decreased and the shear stress increased. When the shear rate was maintained to be a constant, the viscosity decreased with increasing temperatures. The viscous flow activation energies of these dip-coatings decreased with the increasing shear rates. The higher solid contents of WLDDC were, the more its viscosity would decrease with the increasing shear rates, the more prominent its non-Newtonian behaviors would show. Practical implications A sample of good WLDDC with balanced properties was illustrated. Originality/value This investigation benefits to investigate waterborne environment-friendly dip-coatings for the inner glass walls of lamp tubes. This research provides an approach to optimize the viscosity parameters of light-diffusion dip-coatings.

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“…Coating is an industrial process used to produce a continuous or discontinuous film of some nonvolatile material (usually a liquid) on a solid substrate . Coating is used for several purposes such as material protection, magnetization, controlling refractive index, and lubrication . Particularly in food industry, this process is used to modify the appearance of the products, to extend their shelf-life by decreasing the dehydration rate, to improve their mechanical resistance, and to incorporate specific additives, like nutrients and preservatives …”

Section: Introductionmentioning

confidence: 99%

“…In addition, a drying process can occur after (or eventually at the same time) the withdrawing and draining steps, consisting in the evaporation of volatile solvent and the concentration of solutes. The evaporation can be done by thermal or oxidative processes, while the progressive concentration of the dispersed or colloidal phase leads to polymerization, cross-linking, or aggregation phenomena that finalize the film deposition. − Furthermore, in the dip-coating process the substrate geometry can vary extensively (for example, the substrate can be a plate, a cylinder, or an irregular-shaped object), this being a distinguishing advantage of this coating technique. , …”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of a Dip-Coating Process Using a Generalized Newtonian Fluid. 1. Model Development

Peralta

Meza

Zorrilla

2014

Ind. Eng. Chem. Res.

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Dip coating consists in the immersion of a substrate into a reservoir containing a film-forming fluid and then the withdrawing from the bath to produce the film. The objective of this work was to develop a mathematical model of the fluiddynamic variables in a dip-coating process, considering that the film-forming fluid behaves as a generalized Newtonian fluid. An analytical and simple mathematical model that relates the main fluid parameters using a generalized Herschel−Bulkley model was proposed. This model was obtained on the basis of rigorous mass and momentum balances applied to a monophasic and nonevaporative system, where the main forces are viscous and gravitational. The parameters that can be estimated are velocity profile, average velocity, flow rate, local thickness, and average thickness of the coating film. Finally, the sufficient conditions for the model were obtained. The experimental validation and sensitivity analysis are presented in a complementary paper as part 2.

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Modeling, simulation and fabrication of coated structures using the dip coating technique

Cited by 19 publications

References 34 publications

Flame retardant coated polyolefin separators for the safety of lithium ion batteries

Flame retardant coated polyolefin separators for the safety of lithium ion batteries

Effects of viscous flow activation energies and viscosities on waterborne light-diffusion dip-coatings

Mathematical Modeling of a Dip-Coating Process Using a Generalized Newtonian Fluid. 1. Model Development

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